Answer
$A+B=\begin{bmatrix}
0 & 5
\\
8 & -6
\\
0 & 5
\end{bmatrix}$
Work Step by Step
Adding/Subtracting each corresponding element, with $
A=\begin{bmatrix}
3 & 4
\\
6 & -2
\\
1 & 0
\end{bmatrix}
$ and $
B=\begin{bmatrix}
-3 & 1
\\
2 & -4
\\
-1 & 5
\end{bmatrix}
,$ then
\begin{align*}
A+B&=
\begin{bmatrix}
3 & 4
\\
6 & -2
\\
1 & 0
\end{bmatrix}
+
\begin{bmatrix}
-3 & 1
\\
2 & -4
\\
-1 & 5
\end{bmatrix}
\\\\&=
\begin{bmatrix}
3+(-3) & 4+1
\\
6+2 & -2+(-4)
\\
1+(-1) & 0+5
\end{bmatrix}
\\\\&=
\begin{bmatrix}
0 & 5
\\
8 & -6
\\
0 & 5
\end{bmatrix}
.\end{align*}
Hence, $
A+B=\begin{bmatrix}
0 & 5
\\
8 & -6
\\
0 & 5
\end{bmatrix}
.$